Vray RT GPU not working

[Bruce Hart]

Hey
Just some feedback - I have a Quadro FX 1800 with the latest drivers (Win 7 Ultimate, Vray 2.1). I'm finding that the sometimes the GPU will work roughly 50% of the time (in the same session). If I start activeshade sometimes it will just sit there waiting for image data. Other times it will start rendering straight away. Still other times it will apply the wrong gamma to the GPU, but not the CPU. I'm talking about a very simple test scene here. The problems seem quite random, and essentially makes GPU RT unuseable for production on my system.

Perhaps its an issue with Nvidia drivers as mentioned...

[Guest]

Hi,

I just tried a completely new scene with just a teapot and it still doesn't stop at the given value. rendering for 1 minute stops at 54.6 seconds and rendering 500 paths per pixel renders 508. So I now know its not my scene. But my scene still does take an age to load, but then it is a 500mb scene file so maybe it takes a while to get going on the GPU?

[Guest]

Grrr!!! I just added a new PC to the server and Vray RT render server keeps crashing, has same qaudro 4000 with same drivers as the other machines that are working.

It still takes ages for the active shade to start going. Using default settings in Vray RT I just hit render. On the local machine it says waiting for image data for about 5 minutes and on the render slaves the vrayRT server says new data index is and it just keeps counting for about 5 minutes. Then it starts.

So why does this happen and what could be causing the newly added PC/ VrayRT sever to keep crashing? If I can get this working I have 3 Qaudro 4000's and Quadro 3500 to test but I cant seem to get it all up and running

[vlado]

What driver version do you have on the newer machine? The latest drivers crash with the V-Ray RT OpenCL code; however the 270.x drivers work fine. I know we covered this earlier in the topic, but I just thought I'd ask.

[EDIT] Sorry just read that the driver version is the same. Can you get me the crash dump from the V-Ray RT render server?

Best regards,
Vlado

[Guest]

It seems to be working now, I just kept re-starting it and it eventually worked, so no idea why it didn't first time round.

But the Quadro FX 3500 is not working. It has the same 270.61 driver as the others but when you go to select OpenCL devices for V-Ray RT GPU the selection box has no graphics card in it. But I have just looked here http://en.wikipedia.org/wiki/Nvidia_Quadro and it doesn't list CUDA cores, perhaps it doesn't have any :/

The bench mark scene started straight away using DR but a scene I am testing still takes ages to get started, using same RT settings as the bench mark scene. Its not particularly heavy, couple of cars and a back wall.